Upgrade to Electron 8

Co-authored-by: Scott Nonnenberg <scott@signal.org>

.nvmrc

@@ -1 +1 @@
-12.4.0
+12.13.0

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - '12.4.0'
+  - '12.13.0'
 os:
   - linux
 dist: trusty

appveyor.yml

@@ -8,7 +8,7 @@ cache:
 install:
   - systeminfo | findstr /C:"OS"
   - set PATH=C:\Ruby23-x64\bin;%PATH%
-  - ps: Install-Product node 12.4.0 x64
+  - ps: Install-Product node 12.13.0 x64
   - ps: .\build\install-yarn.ps1
   - yarn install --frozen-lockfile
 

package.json

@@ -203,8 +203,8 @@
     "cross-env": "5.2.0",
     "css-loader": "3.2.0",
     "dashdash": "1.14.1",
-    "electron": "6.1.4",
+    "electron": "8.0.1",
-    "electron-builder": "21.2.0",
+    "electron-builder": "22.3.2",
     "electron-icon-maker": "0.0.3",
     "eslint": "4.14.0",
     "eslint-config-airbnb-base": "12.1.0",
@@ -250,7 +250,7 @@
     "webpack-dev-server": "3.8.0"
   },
   "engines": {
-    "node": "12.4.0"
+    "node": "12.13.0"
   },
   "build": {
     "appId": "org.whispersystems.signal-desktop",

patches/app-builder-lib+22.3.2.patch

@@ -1,13 +1,13 @@
 diff --git a/node_modules/app-builder-lib/out/targets/LinuxTargetHelper.js b/node_modules/app-builder-lib/out/targets/LinuxTargetHelper.js
-index b4533a9..13241f5 100644
+index 6e674b9..8e5be4f 100644
 --- a/node_modules/app-builder-lib/out/targets/LinuxTargetHelper.js
 +++ b/node_modules/app-builder-lib/out/targets/LinuxTargetHelper.js
-@@ -129,7 +129,7 @@ class LinuxTargetHelper {
+@@ -135,7 +135,7 @@ class LinuxTargetHelper {
-         exec = `"${exec}"`;
+         exec += executableArgs.join(" ");
        }
  
 -      exec += " %U";
 +      exec += " --no-sandbox %U";
      }
  
-     const desktopMeta = Object.assign({
+     const desktopMeta = Object.assign(Object.assign({